Means for and method of timing spray operations for preventing smutting in printing presses



Dec. 2, 1941.

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v G. GREEN 2,264,521

I SHUTTIHG IN PRINTING' PRESSES Filed Aug. 9, 1939 h `2 sneetsqsneet 1Mmmm' "inns mlmllmlllm; HA

INVENTOR- 75 776mb, .i @mi m v. G. GREEN 2,264,521 MEANS FOR AND METHOD0F TIMING SPRAY OPERATIONS FOR PREVENTING Dec. 2, .1941'.

-SMUTTING IN PRINTING PRESSES Filed Aug.

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Patented Dec. 2, i

MEANS Fon AND METHOD or 'ruime srmrr OPERATIONS ron raavnN'rrNG SMUTTINGm rnm'rma PRESSES l Virgil Green, Chicago; nl.; assignor to BinksManufacturing Company, Chicago, mi., a corporation o! Delawarevapplication August' o, i939, Serial No. 289,234

(ci. i- 422) s claims. The present invention relates to meansfor andmethodl of timing spray operations for preventing smutting in printingpresses, such as web printing presses, wherein the imprints are efiectedon both sides of the web as it travels throughtheprinting couples, andhas reference more particularly to the timing of the applicationof'antii-smutting fluid upon the tympan or backing cylinder of thesucceeding couple for the still wet imprint made in the previous couple.

In presses of this type, the web rst `passes through al couple toreceive an imprint o n one side of the web from thel printing cylinderof that couple, the other side of .the web being backed by an impressioncylinder usually termed axtympan cylinder. As the web then travels tothe succeeding couple,l where the cylinders are in reverse order, theunimprinted side ofY the web is presented to the printing cylinder ofthis couple, and the yet wet imprinted side is presented to the tympancylinder. The latter tympan cylinder-has a tympan sheet covering and, toavoid transfer of ink upon this covering, an anti-smutting uid, such asoil,.is sprayed in a very line continuously during the opera on of thepresa.

stopping only when the press stopped, with the disadvantage of using toomuch oil for proper eect, causing a considerable amount of oil fumes 'inthe-atmosphere which are disagreeable and noxious, and also requiringthe use ora large amountof compressed air for the spraying.

By the present invention, the spraying is eiless compressed air isnecessary, thus eueeting considerable economy.

As another object of the invention is the Drovision of a novel timingmeans for controlling the spraying in given time relation to theoperation of the` tympan referred to above.

A further object of the invention is to provide a novel adjustable meansfor the spraying means to aord access by the operator te certain partsof the press.

ther objects, advantages, apabilities, fea-v tures, and the like arecomprehended by the invention as will later appear, and as areinherentk1y possessed'by the invention.

section, of a printing press embodying the lnfected automatically ingiven time relation to the rotation of the tympan and in givenalternating or intermittent periods of time, such as for alternaterevolutions of the tympan, or variables thereof. In other words, thespraying may occur for a revolution of the tympan and no spraying mayoccur for the next revolution, orr

nextV two revolutions, etc.. On the other hand,

the spray may be for any given4 angular movement lof the tympan andspraying stopped for'- any other angular movement of the tympan. -In

' vention;

Fig. 2 is a transverse'view in elevation of the same;

Fig. 3 isa side view of a timing device for the spraying of oil;

Fig. 4 is a view in elevation of the same;

Fig. 5 is a sectional view of a control valve forming part of the timingmeans;

printing cylinder 3 and altympan cylinder operated by suitable andusualmeans in such types 0f press.

At the Sides of the press and .on the base-'i' thereof are securedangle-form brackets each having a base flange 6 secured to the base E bybolts and an upstandlng flange At the upper portion of the flange I issecured a 'pivot stud 9 upon which is pivoted the lower portion of anarm 9. To the lower portion of the flangey 1 are secured spaced stop orabutment pins l0 against which alternately engage the lower endextension I-I of the arm 9 when swung from and to the positions shown infull and dotted'lines in Figl ofthe drawings.'

At the upper end portions of the arms 9 are' provided suitable aperturesfor the extension therethrough ci'A parallel manifolds or pipes I2manifolds.

and I3 which pipes extend between' the sides I and 2 of the press andare supported at the upper end portions` of the arms 9, these pipesrespectively constituting the air and material pipes or At an end thepipes I 2 and I3 are closed as by caps I4 andv I5, and at the other endare connected to flexible ducts or hoses I6 and I1, respectively. Thematerial duct I1 leads upwardly through an upper platform I8 of thepress, and is connected by way of a valved connection I9 to the lower`part of a material container 20, so that the material may flow bygravity through the duct I1 to the material pipe I3. The air duct I6leads to a cam operated threeway valve`2 I, shown in detail in Fig. 5.

To the material `pipe I3 are clamped a plurality of spaced brackets 22each carrying a spray gun 23 which may be of the type disclosed in thecopending application of Bramsen et al., Serial No. 225,974, led August20, 1938. Connected to the guns 23 are flexible material and air ducts2'4 and 25 respectively connected to the material and air pipes I3 andI2.

The air is supplied from an air supply line 21 by Way of an air cleaner28, pressure regulator 29, electro-magnetic or solenoid operated controlvalve 30, and a flexible air duct or hose 3l leading and connected tothe three-way valve 2|,

The three-way valve 2I is shown in detail in Fig. 5. It comprises a body32 suitably secured to a supporting bracket 33, an air inlet member 34to which the duct 3| is connected, and an air outlet 35 to which duct I6is connected. In the .K

body 32 is a double valve comprising valve elements 36 and 31connectedby a stem 3 8, thev a relief passage 43 leading to outlets 44in the outer end portion of the element 4I. To the outer end portion ofelement 44 is rotatably connected a roller 45 (see Fig. 3) against whicha lcam 46 operates to reciprocate the element 4I in the body 32 of thevalve. In operation, when the cam 46 actsagainst th roller 45, theelement 4I is moved inwardly to close against valve element 31 to shutoff passage of air to the relief passage 43, and to open valve 36-39 soas to permit air to pass by way of inlet 34 to the interior of lthevalve body 32 and thence out through the outlet 35. When the cam lobe 49passes from the roller 45, the springs4 40 and 42 act to close valve36-39 and to move element 4I so as to open relief valve 31-4I.

The timing device, shown in detail in Figs. 3 and 4, comprises the cam46 secured to a shaft rotatably supported in a support 48, thev camhaving a 180 swell or positive lobe 49 and a 180 dwell or negative lobe60, so that for one half vrevolution of the cam-the lobe 49 willmaintain -the three-way air valve 2| open, and for the other halfrevolution of the cam the valve will be-closed. Also secured to theshaft 41 is a pulley 5I driven by a belt 52 driven from a pulley 53secured to the shaft 54 of the printing cylinder, the pulley 53 beinghalf the diameter of the pulley 5I so that the latter will make but onerevolution for each two revolutions of the printing and tympan cylinders3 and 4.

The support 38 is adjustably secured to a stud 55, as by a set screw 56,rigid with an end of a Z-shaped bracket 51 bolted at its other end to an16 upright 66 which is part of the side 2 of the press frame. I'he lowerend portion of the support. 48 is apertured to slidably and rotatablyadjustably receive the lower round end 59 of an S-shaped bracket 60 ofrod form, such lower end 59 of the bracket being secured in adjustedposition by a suitable set screw 6I. To the upper round end portion 62of thebracket 66 is'slidably and rotatably adjustably secured a hub 63,as by set screws 64, the hub 63 forming a rigid or integral part of thethree-way valve supporting bracket 33.

The cam 46, pulley 5I and support 48, as an aggregate, are angularlyadjustable about the stud 56 to obtain the proper operative relationwith the three-way valve 2l as is clearly shown in Fig. 3. The bracket66 is so adjustable in the lower part of the support 48 and the valvesupport 33-63 are so adjustable on the upper end portion 62 of thebracket 60 as to cooperatively associate the three-way valve 2I withrespect to the cam 46, as clearly shown in Figs. 3 and 4 of thedrawings.

The surface of the tympan cylinder 4 is covered with a smooth surfacedsheet 65 or a rough surfaced sheet 66,f.as carborundum paper. When usingthe sheet-65, a roller 61 with a yieldable surface, such as the pile ofa pile fabric, an example of which is plush, is so rotatably mounted asto have its pile surface 68 in contact with the surface of the sheet 65,and the battery of spray guns 23 are so located asto project fine sprays69 of oil upon the surface df the plush roll. In the case of using therough surfaced sheet 66, the battery of spray guns 23 are so located asto project ne sprays 10 of oil directly upon the carborundumAprojections on the sheet 66 without the intermediary of the plush roll,but it is preferable to also use a squeeze roll 1I which has a surfaceof yieldable and elastic material, such as rubber, gelatin, or similarcompositions, for the purpose of applying a very slight squeeze upon thepoints of the carborundum so as to assist in the` distribution of theminuteparticles of oil sprayed thereon.

The plush roll 61 so rotates that its contacting surface with the tympantravels in the same direction as the adjacent surface of the tympan butthe surface speed of travel of the plush roll' is either slightlygreater than or less than the .surface speed of the tympan surface orcover, so

that there will be a relative wiping action of the plush roll on thetympan While at the same time distributing the particles of oil upon thesurface of the tympan cover 65. This differential travel acts to wipeaway some of the ink that has been transferred to the tympan sheet fromthe freshly imprinted portions of the web. The surface travel of thesqueeze roll 1I is in the same direction and with the same speed as thesurface speed of the tympan cover 66.

The ratio of the pulleys 5I and 53 is two to one so that the sprayingupon the tympan will be for alternate revolutions thereof, that is, thespray guns will spray for one full revolution of the tympan, duringwhich the cam 46 makes a onehalf revolution, and will not spray for thenext full revolution of the tympan, during' which the cam 46 makes itsnext one-half revolution. This is advantageous in that a suflicientamount of oil is sprayed during the alternate revolutions of the tympan'to produce the desired effect, and

there isI consequently a saving of air used to atomize the material andalso a saving of oil which might otherwise be wasted in the atmosphere,if the guns were spraying continuously.

carried at the upper end portions of thearms` 9 so that the assembly maybe swung back as to the dotted line position shown in Fig. l, to affordaccess by the operator in the press between the couple and the assembly`mentioned above. When the assembly is to be put into operation, itfisswung forwardly, as to the full line position shown thereof in Fig. 1 ofthe drawings.

in operation the material, such as oil, hows from the container 20 byway of valve i9, duct il, manifold I3, ducts 24 to the guns 23, where itis atomized and sprayed in a very fine spray upon the plush roll B1 oron the tympan sheet S6, as the case may be. The air under pressure flowsfrom the supply pipe 21, by way of the cleaner 28, regulator 29, thesolenoid operated control valve 30, duct 3i, to the three-way valve 2l.The latter is operated by the cam d6 which, when its lobe 4s opens thevalve, causes the air to iiow by way of the duct I6, air manifold l2,and ducts 25 to the spray guns 23. The valve 2i is open for one-halfrevolution of the cam Q6 and closed for' the other half revolutionthereof, during which time spraying willv be eiected for one full'revolution of thel tympan and be stopped for the other full revolutionlthereof.

Figs. 8 and 9 'show diagrammatically the couples, the printing andtympan cylinders 3 and d of the second couple being in reverseorder tothe printing and tympan-cylinders@i and 4" of the iirst couple, and theweb W being shown in its travel in the direction of the arrows. As theweb W leaves the couple 31a-te, it has the air to be supplied toy wet,imprint on its upper side, and as it reaches the couple --d this imprintis presented to the tympan d while the printing cylinder t eects'animprint on the under side of the web. In Fig. 8 are shown the plush rollSi and guns 23 located with reference to the tympan li to apply the oilto the tympan sheet t5. in Fig. 9 are shown the guns 23 sprayingdirectly upon the tympan sheet te, and the squeeze roll i l below and incontact with said sheet t6.

It is to be understood that the invention .com`

ized form for applicationto said sheet, a pressure air supply means isconnected to said guns, and an oil supply means is connected to saidguns; the combination of a cam operated valve in said air supply means,`a cam operatively associated with-said valve and having a cam lobe foroperating'. said valve, means operatively connected to said couple andsaid cam for operating said cam, saidlobe being of such length as tohold said valve open for-the duration'of a -given angular movement ofsaid tympan and'to close said valve during another given angularmovement of said tympan. y

2. A device for timing spray operations for preventing smutting in a webtype ofprinting press where there is contact of a freshly im printedportion of the web with the tympan sheet covering the tympan cylinder ofthe couple for effecting an imprint on the opposite side of the web fromthat bearing said freshly imprinted portion and wherein there are abattery of spray guns alined along the tympan to project oil in nelyatomized form for application to saidsheet, a pressure air supply meansconnected to Isaid guns, and an oiifsupply means connected to said guns;the combination of a cam operated valve in said air supply means, a camoperatively assosaid tympan wherebyy the oil is sprayedfor a. givenangular movement of said tympan and is.

stopped for another given angular movement of said tympan.

3. A device for timing theapplication' of oil for preventing smutting ina web type of printingv press Where there is contact of a freshlyimprinted portion ofthe web with the tympan sheet covering the tympancylinder oi the couple for effecting an imprint on the opposite side' ofthe web from that bearing said freshly imprinted portion and in whichare a-battery of spray guns aiined along the tympan and so locatedl asto project oil in'finely atomized form for application to said sheet,and a rotating roller having a yieldable surface in. contact with saidsheetfor distributing the sprayed particles of said oil over the surfaceof said sheet; the combination therewith of means for controlling thetime of spraying in relation to the rotation. of the tympan, includingmeans driven by the couple to cause the guns to spray intermittently forgiven angular movements of the tympan.

4. In a device for preventing'smutting in a web type of printing presswhere there is contact of a freshly imprinted portion of the web withthe ments of parts, and the like without departing from thespirit of theinvention. 1

Having thus disclosed the invention, I claim: l. A device for timingspray operations for I preventing smutting in a web type of printingpress where there is contact of a freshly imprinted portion of the webwith the tympan sheet covering the tympan cylinder of the couple-foreii'ecting an imprint on the opposite 'side of the web from that bearingsaid freshly imprinted portion and wherein there are spray guns a edalong the tympan to project oil in nely atoxnfI5 tympan sheet coveringthe tympan cylinder of the couple for eecting an imprint on the oppositeside of the web from that bearing said freshly imprinted portion, andwherein oil is projected in'nely atomized form for applica-tion to thetympan cylinder by an assembly of sprayguns with an air manifoldconnected to said gunsand a material manifold connected to said guns;the combination of a sing support for said assembly adapted to hold'saidassembly in operative position relative to said tympan for projectingmaterial innely atomized forml and to hold said assembly away from saidtympan to aiord access to said couple, means operatively connected tosaid couple and said assembly for causing said guns to project saidmaterial in said finely atomized form when said assembly is in saidoperative position in given time relation with given angular movementsof the tympan.

5. A device for timing the application of oil for preventing smutting ina web type of printing press where there is contact of a freshlyimprinted portion of the web with the tympan sheet covering the tympancylinder of the couple for effecting an imprint on the opposite sideofthe web from that bearing said freshly imprinted portion and whereinare a battery of spray guns alined along the tympan and so located as toproject oil in finely atomized form for application to said sheet, and arotating roller in contact press where there is contact of a freshlyimprinted portion of the web with the tympan of the couple for eiectingan imprint on the opposite side of the web from that bearing saidfreshly imprinted portion, and wherein there is an applying of theoil inminute particles over the surface of the tympan sheet covering thetympan cylinder, by projecting said oil in finely atomized form in adirection'for application thereof to said sheet, and distributing saidparticles of oil over said sheet during the revolutions of said tympan,the combination therewith of the step of applying said fine spray-of oilduring only,

alternate given angular movements of the tympan cylinder. y

'7. A, method of timing the application of oil for preventing smuttingin a web type of printing press where there is contactv of a freshlyimprinted portion of the webwith the tympan of the couple for effectinganimprint on the opposite side of the web from that bearing said freshlyimprinted portion, and wherein there is an applying of the oil in minuteparticles of the tympan sheet covering the tympan cylinder by projectingsaid oil in finely atomized form in a direction for application thereofto said sheet, including the distributing of said particles of oil oversaid sheet-by effecting a slight squeezing action upon the elements ofthe lsurface of said sheet during all angular movements ofthe tympan;the combination therewith of the step of projecting said oil upon saidpile surface of-the roll only during alternate given angular movementsof the tympan cylinder. i Y 8. A method of timing the application of oilfor preventing smutting in a web type of printing press where there iscontact of a freshly imprinted portion of the web with the tympan of thecouple for effecting an imprint on the opposite side of the web fromthat bearing said freshly imprinted portion, and wherein there is anapplying of the oil in minute-particles over the surface of the tympansheet covering the tympan cylinder-*by projecting said oil in finelyatomized form in a direction for application thereof to said sheet, anda distributing of said particles of oil over said sheet; the combinationtherewith of the step of applying said oil during only alternate givenangular movements of the tympan cylinder.

9.- A timing device for controlling the operation of spraying meanshaving liquid and air supply A means in a printing press, comprising aspring pressed valve connected to the air supply means, a cam forintermittently operating said valve, drive means' operatively connectedto the cam and to an operating part of the press, a cam supportadjustably connected to a xed part of the press and operatively carryingthe cam, a valve support carrying said valvel and adjustably connectedto and carried by said cam support for maintaining the adjusted relation.of said valve and cam in all adjusted positions of said cam support.

' VIRGIL G. GREEN.

